Automatic sanding-box



(No Model.)

W. GORKILL.

AUTOMATIC SANDING BOX. No. 289,984. A Patented Dec. 11, 1883".

WITNESSES INVENTOR A fl mwag m A 7 BY ATTORNEYS.

N PETERS. PhoIu-Lilhcgraphcr. Washington. ac

FFMIEQ rena \VILLIAM CORKILL, OF PITTSFIELD, MASSACHUSETTS;

AUTOMATlC SANDING-BOX.

SPECIFICATION forming part of Letters Patent No. 289,984, dated December 11, 183.

Application filed March 8, 1883.

(No model.)

To (1. whom it" 'nm-y concern:

Be it known that I, WILLIAM COR'KILL, of Pittsfield, in the county of Berkshire and State of Massachusetts, have invented a new and Improved. Automatic Sanding-Box, of which the following is a full, clear, and exact description.

My invention consists of a contrivanee of devices in a small box, to be held up in the hand for blowing sand in a regular and uniform jet upon freshly-painted work, in lieu of the common pepper-box device, the said contrivance consisting of a revolving perforated sand-feeding cylinder and a fan-blower, with springpower apparatus for working them to supply the sand in a steady stream and project it from a spout at the end of the box, from which the sand may be discharged with accuracy and in a more or less concentrated jet, as required, upon the paint in places where it cannot be thrown by the common contrivance, and so as to largely economize the sand and materially lessen the labor of applying it, all as hereinal'ter fully described- Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a plan or top view of my improved automatic sanding-box. Fig. 2"is alongitudinal sectional elevation of the machine on line 00 a: of Fig. 1. Fig. 3 is a longitudinal sectional elevation through the spring -power mechanism on line 1 of Fig. 1. Fig. 4 is a perspective view of a concentrator to be used for condensing the jet.

In any suitable light box or case, a, of sheet metal or other approved material, provided with a handle, I), at one end, by which to hold it, and having a spout, 0, for the discharge of the sand at the other end, I arrange a hollow perforated cylinder, (1, to receive the sand and deliver it on the bottom e of the box, in rear of the spout c; and I provide a fan-blower, f, to blow the sand out through the spout 0 upon the work, both the fan and the sand-feeding cylin- (101. being geared with a spring-power device, g, for revolving them, the fan being geared by a train, 71, suitably contrived for the requisite high speed for generating a blast of sufficient power, and the cylinder being geared by the wheel i, which turns it at a moderate speed suitable for tumbling the sand, so as to prevent the perforations from clogging and deliver the sand in the proper quantity. The cylinder (1 has a door, 9', in the shell for opening to supply the sand, and having suitable fastening devices to secure it when closed; and a ratchet and pawl, 7c, is provided for connecting the cylinder for driving, and so that the cylinder may be turnedback to set the door uppermost when the cylinder is being filled, in case it should have stopped with the door under.

To prevent the sand from falling through the cylinder when filling it, I have provided a curved stopgate consisting of plate Z, and arrange it in suitable grooves, m, to sl de under the cylinder in close proximity to it and ob struct the escape of sand. When themachme is to'be used, the plate is to be shifted up around the cylinder to the top, or therea'bout, where 1t will rest till required to be shifted under the cylinder again. The cylinder may also be1nclosed at the sides by stationary plates, if desired, to confine the sand. When it is desired to concentrate the sand-blast upon a small area, I employ the device as, (represented in F1g. 45,) con sisting of a piece of tin with three sides bent or shaped to converge upon a narrow orifice, and being fitted to rest in. the spout c.

I arrange the spring-power mechanism in a case, it, upon one side of the box a, 1n which it is properly incloscd for protection from sand, and will have suitable sliding or other doors for opening it to lubricate the journals when required. The spring is to be wound up by a key applied to the post 0 of the spring-axle. The handle is attached by means of loranclnng arms 12, which terminate each side of the tancase i in bars q 8, connecting with the bottom a and the upper edges, to, of the sides of the box, respectively, and being suitably shaped for strongly bracing the parts.

I do not limit myself tothe particular contrivance of the operating mechanism herein shown, for that may be modified at the pleasure of the constructor.

The spout a may be taken out in case it is desired to distribute the jet more widely.

Having thus described my invention, 1 clalm as new and desire to secure by Letters Patent- 1. The combination of a hollow perforated revolving sand-feeder, d, and a fan-blower in a suitable box or case, having means for operating the cylinder and fan for ejecting sand, substantially as described.

2. The combination of a hollow perforated 5. The combination of the concentrator m and spout c with the sand-feeding cylinder, fan-blower f, and the mechanism for operating the said fan and cylinder, substantially as described.

6. The combination, with the box or case a, provided with the grooves m, and the perforated cylinder d, of the slide Z, working in the grooves of the box or case, substantially as and for the purpose set forth.

7. The combination, with the box or case at ca, of thchandlel), provided with the branches 1 p and bracing-arms qs, substantially as herein shown and described.

WILLIAM CORKILL. Vitnesses:

.ToI-IN ConKnILL, FREDK. T. ASHTON. 

